双层分段内嵌式永磁同步电动机的电磁转矩优化

摘要

The electromagnetic torque optimization in multi-segment and double-layer (MSDL) interior permanent magnet (IPM) machines with various magnet pole-arc coefficients,setting depth and different ratio of permanent magnets and permanent magnet slot length are studied.Higher torque (Ta) and lower torque ripple (Tr) were acquired through the optimization.Taguchi method had been used for a multi-target optimization design to analyze the performance of the machine while the Parameter changes.Then develop the parameters which affect the machine's performance most as variables to establish the response surface equation of Ta and Tr.The Genetic Algorithm (GA) fitness functions were proposed and the final optimization results were obtained.The feasibility of the torque optimization of the MSDL IPM machine by using the proposed method is verified in this paper.%针对双层分段内嵌式永磁电机的特点,选择电机转子两层永磁体的极弧系数αp1,αp2,永磁体埋入深度h和永磁体与永磁体槽长度之比l1/l24个参数作为初选变量,对电动机的电磁转矩进行优化,使得电动机在获得较高转矩Ta的同时具有较低的转矩波动百分比σ.优化过程中首先采用田口参数优化方法对电机进行多目标优化设计,分析αp1,αp2,h,l1/l2改变时电机转矩Ta和转矩波动Tr的变化趋势;其次对于影响趋势显著的变量进一步采用响应曲面法分别建立Ta,σ的响应面方程.最后参考响应面方程建立遗传算法的适应值函数,利用遗传算法进行全局搜索,得到最终的优化结果.仿真结果验证了上述方法的有效性和正确性.